Description

Root cause: The Polymarket API returns null for the orderPriceMinTickSize field on some sports markets. Our code was calling .toString() on that value without a null check, which threw a runtime error. Since the entire batch of events was parsed in a single .map(), one bad event crashed the whole thing and returned an empty list.

Fix:

1. Changed market.orderPriceMinTickSize.toString() to market.orderPriceMinTickSize?.toString() ?? '0.01' to safely handle the null.
2. Updated the TypeScript type to number | null to correctly reflect what the API actually returns.
3. Changed the event parsing loop from .map() to .flatMap() with a per-event try/catch, so a single malformed event is skipped and logged instead of taking down the whole batch.

Changelog

CHANGELOG entry: football prediction markets not loading

Related issues

Fixes: https://consensyssoftware.atlassian.net/browse/ASSETS-3259

Manual testing steps

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